[jira] [Commented] (HIVE-17953) Metrics should move to destination atomically

["Alexander Kolbasov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-17953?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16233531#comment-16233531 ] 

Alexander Kolbasov commented on HIVE-17953:
-------------------------------------------

[~asherman] [~stakiar] FYI

> Metrics should move to destination atomically
> ---------------------------------------------
>
>                 Key: HIVE-17953
>                 URL: https://issues.apache.org/jira/browse/HIVE-17953
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>    Affects Versions: 3.0.0
>            Reporter: Alexander Kolbasov
>            Assignee: Alexander Kolbasov
>         Attachments: HIVE-17953.01.patch
>
>
> HIVE-17563 reimplemented metrics using native nio interfaces. It used the assumption that{{Files.move()}} is atomic operation. It turns out that by default it isn't, unless {{ATOMIC_MOVE}} option is specified. Otherwise the destination file is unlinked and then the source file is copied.
> This may cause test failure since the file may be temporarily unavailable.



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